Lock.



PATBNTED APR. 19, 1904. L. A. FRANK.

APPLICATION IILED OGT.5, 1903.

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PATBNTB'U APR. 19, 1904( L. A; FRANK..

No. '15V/33.

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Patented April 19, 1904.

PATENT OFFICE,

- LOUIS A. FRANK, OF CHICAGO, ILLINOIS.

srncrnion'rmivformingpaaerLettersPaiement).'757,733,11aaAprilis,ieee]`Application filed October 5, 1903. Serial No. 175,745 (No modelf i Toall whom, t may concern,.-

Beit known that I, Louis A.- FRANK, a citizen of the United States,residing at Ohicago, in the county of Oook and State of Illinois, haveinvented certain new and useful Improvements in Locks for Vessel-Covers,of which the following is a specification.

This invention relates to improvements in that type of locks known ascombinationlocks, andwhile it is more especially intended for use oncovers for milk-cans, and in the present instance I have shown it inconnection with such a cover and will so describe it hereinafter, yet itis with slight changes in construction applicable as a lock for thecovers of other vessels and for other purposes.

The principal object of the invention is to provide a'lock of theabove-named character which shall be of simple construction and so madethat the cover may be automatically secured'in place in such a mannerthat it cannot be removed except by a person cognizant with thecombination of the lock.

Another object is to so construct the parts as to prevent milk or othermaterial entering the casi/ng which incloses the locking mechanism. l

A further object is to provide means to permit of easy access to saidmechanism when it is desired to change the combination or to clean theparts.

With the foregoing and other objects and advantages hereinafter to beenumerated in View the invention consists in certain peculiarities ofthe construction, novel arrangement, and operation of the various partsthereof, as will be hereinafter more fully set forth and specificallyclaimed. r

In order to enable others skilled in the art to whichmy inventionpertains to make and use the, same, I will now proceed to describe it,referring tothe accompanying drawings, in which- Figure l is a centralVvertical view, partly in section and partly in elevation, of a lockembodying my invention, showing it applied to the cover of a milk-canand illustrating the' same locked in position. Fig. 2 is a plansectional view taken on line A2 2 of Figi, showing a portion of themilk-can and illustrating the graduated dials of the lock. Fig.' Sis asimilar view taken on 'line 3 Sof Fig. l, showing the interior of'r thelocking mechanism. Fig. A is a detached plan 'view of the upperregulating-disk. Fig." 5 is "a similar view of the lowerregulating-disk. Fig. 6 is a bottom plan view of theI lower-regulatingdisk. Fig. 7 is a detached bottom'plan View vof thekeeper-plate for the lower'disk. Fig. 8 is 1an enlarged fragmental planview of the upper and lower regulating-disks and' the locking-bolts,showing the latter extended.

Fig. 9 is a vertical view, partly in section and partly in elevation,thereof. Fig. 10 isa view in elevation, showing the edges of theregulating-disks, looking from the end of one of the locking-bolts. Fig.1l is a perspective view of a portion of thesupporting-bar for thelocking-bolts, and Fig. 12 is a similar view of a portion of one of thesliding blocks.

Like numerals of reference refer to corresponding parts throughout thedifferent views of the drawings. j The reference-numeral 2O represents amilkcan of the ordinary type which is contracted to form a neck 2l, theupper portion of which is ared, as at 22, and is provided with a bead 23around its rim. Located in the neck 2l is a ringr24, which is providedon its inner surface with an annular groove 25 to receive the outer endsof the locking-bolts.-V As will be seen by reference to Figs. l, 8, and9 of the drawings, the groove 25 has itslower surface beveled and itsupper surface located in a horizontal plane. The cover which comprisesthe casing for the locking mechanism consists of acircular flaringportion 26, provided at its lowerend with a cylindrical portion 27 toiit in the neck 21 of .the can. Fitted around the portion 27 anddetachably secured thereto by means of screws 28 is a basin-shapedbottom 29, which when'in position on the portion 27 will nt snuglywithin the'ring 2li, as is clearly shown in Fig. l of the drawings.Secured within the upper portion of the part 27 of the cover and securedthereto is a top locking bolts.

30, which is provided with a central opening 31 to receive one of thegraduated dials. and t0 permit of the regulating mechanism being removedfrom the casing formed by the portions 27, 29, and 30, as will bepresently eX- plained. Located diametrically across the portion 27 is abar 32, which supports the rl`his bar has at each of its ends anupturned apertured ange 33, which are secured to the inner surface ofthe walls of the part 27 of the cover. The'walls of the bottom 29, aswell as those of the part 27, are provided with openings at points toregister with the openings in the iianges 33 of the bar 32 for theoperation of the locking-bolts. The bar 32 is formed or provided on itsupper surface with a number of inturned lugs 34, which are arranged inpairs to furnish guideways for the sliding blocks 35, which carry thelocking-bolts 36, which bolts have their outer ends beveled, as shown,to correspond with the shape of the groove 25 in the ring or piece 24,which serves to reinforce the neck of the can as well as to furnish asocketed piece for said bolts. As shown, the bar 32 is provided in itsmiddle with an opening 37 to receive the operating stern or spindle 38,the lower portion of which is angular in cross-section,while Aits upperpartis cylindrical and is provided with a knob l39 used for turning thesame when it is desired to retract the locking-bolts 36, so as to unlockthe cover. As will be observed by reference to Figs. 1, 8, and 9 of thedrawings, one of the sliding blocks 35 is located on each side of theoperating-spindle 38 and will be guided in'their movements by means ofthe lugs 34,which overlap the flanges 40 on the lower .portion of eachside of said blocks. The outer end of each of the blocks 35 is providedwith alongitudinal opening 41 for the reception and operationof the rods42, with which each of the locking-bolts 36 is provided on its innerend. Each of the blocks 35 is provided near its outer end with atransverse slot 43 for the operation of apin ,44, which is located in asuitable opening in the inner end of the rods 42, which pin prevents theaccidental dislocation of said rod. The inner end of each of the blocks35 is provided with an obliquely-extending arm 45, which carries a pin46 to engage slots 47, formed in the ends of the double crank or bar 48,which is mounted on the operating-spindle 38, so as not to turn thereon.

Located on the upper surface of the top 30 of the cover is a dial 49,which has on its lower surface a circular projecting portion 50 to fitin the opening 31 of the cover 30, which is provided near its peripherywith a graduated scale 51 andthe letters Aof the alphabet or othercharacters. The dial 49 has a central opening and is provided on itslower surface around said opening with a hollow projectlon 52, whichopening and projection receive a tubular spindle 53, which surrounds thespindle 38, as shown in Fig. l of the drawings. The dial 49 is providedat a suitable point with a pointer 54 to indicate on the scale 51 thepoint to which it may be turned, and has on its upper portion agraduated scale 55 with numerals or other characters. Located around thehollow projection 52 of the dial 49 is a collar 56, which is fixed -tosaid projection by meansof a set-screw 57 and has a laterally-extendingarm 58, provided with a depending pin 59 to engage the openings 60 inthe upper regulating-disk 61, which is mounted on the lower portion ofthe projection 52, as is clearly shownv in Figs. 1 and 9 of thedrawings. Fixed on the lower portion of the tubular spindle 53, by meansof a screw 62 or otherwise, is a supporting-plate 63, for the lowerregulating-disk 64, which is mounted on the tubular stem 53 and has anumber ot' openings 65 arranged in a circle around its central openingto receive an engaging pin 66 on the upper surface of said plate. Thelower surface of the disk 64 is provided with a scale and numerals 67 tocorrespond with the scale 55 on the dial 49, and the upper disk 61 isprovided with a number of openings to correspond with the number ofcharacters on the scale 5l of the top of the cover. Extending upwardlyfrom one of the sliding blocks 35, so as to impinge the periphery of theupper disk, is a standard 68, which has at its top a lateral projection69 to fit in the recess 70 of the upper disk when it is desired toretract the locking-bolts. The other sliding block is provided with anupright standard 71 to impinge the periphery of the lower disk 64 and tofit in the recess 72 thereof, when the 'locking-bolts are retracted.While I have shown the standards 68 and 71 as being located on oppositesides of the operating-spindle, yet it is apparent that one only may bevemployed, which may be formed without the lateral projection, in whichcase the recesses in the disks should register with one another.Surrounding each of the rods 42 of the locking-bolts and interposedbetween the inner ends thereof and the outer ends of the sliding blocksare spiral springs 73, which normally project said bolts, yet will allowthem to yield suhiciently to engage the groovo25 when the cover ispressed downwardly, thus automatically locking the cover in position.

From the foregoing and by reference to the drawings it will be seen andclearly understood that by adjusting the uppendisk 61 and fixing it bymeans of the pin 59 on the arm 58 in one of the holes 60, so that therecess 7 O in said disk will register with the pointer 54 on the dial49, and that by turning said dial to a certain point-for instance T onthe scale 51-the recess 70 may be brought into aline- Ioo IIO

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ment or so as to receive the upper portion of the standard 68 on one ofthe sliding blocks. By -adjusting the lower disk 64 and securing it bymeans of the pin 66 on the supportingplates 63 in one or' the holes 65,so that the numbers of the scale 67 on its lower surface will registerwith those of the scale on the dial 49, and by turning the knob 75,located on the upper end of the tubular spindle, so that the pointer 74on said knob will indicate a certain number on the scale -for instance,95-the disk 64 maybe turned so that the recess 72 therein will registerwith or be placed in position to receive the standard 71, when thelocking-bolts may be retracted;

When the parts are arranged as above described, it is apparent that thecover may be removedfrom the vessel, when by detaching the bottom 29 ofthe casing for the locking mechanism and removing the pin 76, which islocated in a transverse opening in the spindle 38 below'the bar 32, fromsaid spindle the disks, spindles, and dials may be removed through theopening 3l in the top of the casing, so that the disks may be suitablyadjusted to change the combinations. ,a

In order to hold the disks 6l and 64 a slight distance apart and whendesired to create yfriction between the two, one of the disks,

usually the upper one, 61, is provided with lugs 77, which will rest onthe upper surface of the lower disk. It is apparent that by movingeither of said disks on the tubular spindle 53 friction between them maybe increased or diminished, so as turn easily or with more diffjculty.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

vl. The combination with a vessel having in its opening a recess, of acover to close the opening, a hollow spindle rotatably located in thecover, a dial fixed to the upper portion of said spindle and resting onthe top of the cover, an operatingspindle located in the hollow spindleand having on its upper end a knob, a disk adjustably mounted on thehollow spindle below the top of the cover and having a recess in itsperiphery, a spring actuated locking-bolt located in an opening in thewall of the cover to engage the recess in the opening of the vessel,means connecting the lower portion of the operating-spindle and thelocking bolt to retract the latter when said spindle is turned, and astandard on said connecting means to impinge the periphery of the diskwhen the bolt is projected and to t in the recess thereof when said boltis retracted.

2. The combination with a vessel having a recess in its opening, of acover to fit in and close said opening, ahollow spindle rotatablylocated in the cover, a dial xed on the upper portion of said stem andresting on the top of vessel, means connecting the lower portion of theoperating-spindle and the locking-bolts to retract the latter wheny saidspindle is turned, and a standard on said connecting means to lit in therecesses of the disks when the bolts are retracted.

3. The combination with a vessel having inA its opening a recess, of Vacover to close the opening, a hollow spindle rotatably located in thecover, a dial iixed to the upper portion oi' said spindle and resting onthe topof the cover, an operating-spindle located in the hollow spindleand having on its upper end a4 knob, a disk adjustably mounted on thehollow spindle below the top of the cover and having a recess in itsperiphery, spring-'actuated locking-bolts located i-n the openings inthe walls of the cover to engage the recess in the opening of thevessel, means connecting the lower portion of the operating-spindle andthe locking-bolts to retract the latter when said spindle is turned,anda standard on said connecting means to impinge the periphery of thedisk when the bolts are projected.

4. The combination with a vessel having a recess in its opening, of acover to lit in and close said opening and provided with a scale on itstop, a hollow spindle rotatably located in the cover, a'dial iXed to theupper portion of said spindle and resting on the'top of the cover, anoperating-spindle located in the hollow spindle and having on its upperend a knob, an upper and lower regulating-disk adjustably mounted on thehollow spindle and each having a recess in its periphery, springactuatedlocking-bolts located `in openings in the walls of the cover to engagethe recess in the opening ofthe vessel, means connecting the lowerportion of the operating-spindle and the said bolts to retract thelatter when the spindle is turned, and va standard located on theconnecting means on each side of the operating-spindle to {it in therecesses of the disks when the bolts are retracted.

5. The combination with a vessel having an annular groove in itsopening, of a cover to fit in and close said opening and provided with ascale on its top, a hollow spindle rotatably located in the cover, adial fixed to the uppen portion of said spindle and located above thetop of the cover, an operating-spindle located in the hollow spindle andhaving on its Lipper end a knob, an upper and lower regulatingdiskadjustably mounted on the hollow spindle below the top of the cover andeach having a recess in its periphery, a supporting- IOC IIO

bar secured diametrieally within the cover and having guideways on itsupper surface, a sliding block located Within the gudeways of thesupporting-bar on each side of the operatingspndle and connectedthereto, a spring-actuated. looking-bolt movably secured to the outerend of each of the sliding blocks and extending through openings in theWalls of the cover,

and a standard mounted on one of the sliding blocks to b in the recessesof the regulatng- IO disks when the locking-bolts are retracted.

LOUIS A. FRANK.

Witnesses: w

CHAS. C. TILLMAN, A. GUsTAFsoN.

